Title : Docker "FROM scratch"
Author : Meshari Alnaim <[email protected]>
Date :
KSU IS
- What is Docker ?
- Linux (Ubuntu, Debian, CentOS, Fedora, Raspbian ... etc) https://docs.docker.com/engine/install/
- MacOS got to https://hub.docker.com/editions/community/docker-ce-desktop-mac/
- Windows go to https://hub.docker.com/editions/community/docker-ce-desktop-windows/
- Standardize our development environment (i.e. ubuntu LTS 16.04 using python 2.7 ) from development to production.
- Secure our environment .
docker pull ubuntu:16.04The Dockerfile
- Create a file named Dockerfile and add the following docker commands
FROM ubuntu:16.04
LABEL maintaner="Meshari Alnaim <[email protected]>"
LABEL name="dev"
LABEL version="v1"
RUN apt-get update && apt-get -y upgrade
RUN apt install -y python- Save the Dockerfile and run the following command to build the Dockerfile in the corrent directory
docker build .- Check the images
# Legacy command
docker images
# updated command
docker image ls
- list all the images
dokcer image ls- Now lets run the container
# we run ubuntu 16.04 docker container name is_dev
docker run -it --name is_dev ubuntu:16.04- install python and nano in the container
apt update
apt install -y nano python nginx
# Nginx example
nano nano /var/www/html/index.nginx-debian.html
service nginx start
nginx -s reload
service nginx reload
# Python example
nano hello.py
# add the two lines in to the python script
#####
#!/usr/bin/env python
print("Hello IS Students !")
#####
# now exit and make the script executable
chmod +x hello.py
python hello.pydocker images
docker container ls
docker container ls -a
docker container start is_dev
docker attach is_devdocker container ls -a
docker images
docker push malnaim/ksu_is:v1
docker container rm is_dev
docker rmi <image_name>docker run -itp 8080:80 --name is_dev ubuntu:16.04docker run -itp 8080:80 --volume /home/USER/Code/KSU_IS/html:/var/www/html:ro --name is_dev ubuntu:16.04- First let's create our first Javascript file called "server.js" and write the following javascript code :
var http = require('http');
function onRequest(request, response) {
response.writeHead(200, {'Content-Type': 'text/plain'});
response.write('Hello KSU Students');
response.end();
}
http.createServer(onRequest).listen(8000); - Create our Dockerfile and COPY our code into the Dockerfile
FROM node
WORKDIR /app # change to app directory
COPY server.js .
USER node
EXPOSE 8000
CMD ["node", "server.js"]- Build the image
docker build -t js:latest .- Run the container
docker run -itp 8080:8000 --name js_server jsdocker stop (docker ps -a -q)
docker rm (docker ps -aq)
docker rmi (docker images -aq)